Rigging Training Workshop - Rigging Selection (sheave blocks)

Circle the best answer for each system which matches the illustrations at the right.
Information: All winches have a maximum capacity of 2 tons. All single sheave rigging blocks are rated at 3 ton WLL, and triple sheave rigging blocks are rated at 10 ton WLL. All load and wall anchor pulling lugs are rated at 8 ton WLL each. All shackles are rated at 12 tons each.
Panels from ITI Bookstore's Journeyman Rigger's Reference Card and Master Rigger's Reference Card have been provided to assist you in your calculations.
(Answers below)

System 1, no blocks
A) OK
B) No, high potential for overload if the winches are not synchronized
System 2, single sheave blocks
A) OK
B) No, it would not tend to pull square and would require constant attention to rollers
System 3, triple sheave blocks
A) OK
B) No, it would overload the load’s pulling lug
Caution: Don’t stand in the bight.

Happy trails to all my crane and rigging friends,
 Mike Parnell
ITI-Field Services

 Source: http://iti.com/simscrane

Answers:
System 1 = B, System 2 = B, System 3 = A

Our customer stories

Perfect Service Starts Here
  • “Professional, safe , and experienced crane operators. Some of the best I’ve had the pleasure to work with in 40 years of building power lines. On time service, and they go above and beyond to make sure they take care of the customer’s needs from cranes to hauling logistics. Really a pleasure to work with.” 

    - Jim
  • “Sims Crane Atlanta is the best in the business. I have worked with this group for the last 10 years and have always had tremendous success using them. They are highly knowledgeable, top tier equipment, professionalism, pricing, communication, etc. I would highly recommend using them with your next project!” 

    - Brandon
  • “It is always a pleasure working with Sims! Some of the best operators in the business, as well as a very in touch sales team! Highly recommend using them for any crane needs.” 

    - Dylan
  • “The efforts were led with consistent feedback, planning and precise execution day by day, making a difficult task painless and smooth. The install team was very professional, well trained and knowledgeable. They answered any questions we had and ensured a safe and swift installation, faster than anticipated. They were accommodating for last minute field decisions and provided assistance wherever needed. All of the Sims team members have proven to be true construction professionals and thus I will continue to reach out on future projects.” 

    - Landon
Additional Information